When I make noodles, I have the noodles in the water, and the heat is on enough to keep the water at a boil, and steam comes up out of the pot at a constant rate. Pretty normal. When the noodles are done and I turn the heat off, the amount of steam coming out of the pot suddenly increases. I've noticed that this behavior is independent of the presence of noodles in the water.
2007-01-13 09:02:19 · 4 answers · asked by Tony Hex 1 in Science & Mathematics ➔ Physics
When the water is hotter, the steam it produces is less dense. It's also scattered by the rising heat from the flame.
When it cools, it becomes more condensed and therefore more visible.
See what happens when you bring it outside in the cold.
2007-01-13 09:14:01 · answer #1 · answered by Mickey Mouse Spears 7 · 1⤊ 1⤋
When the heat is on and the water is boiling, the water first goes into the steam phase (liquid/gas) then becomes a complete gas, which is not visible. When the heat is off, the gas cools instantly and the gas now becomes visible, which is steam, then cools further to return as liquid.
2007-01-13 10:15:53 · answer #2 · answered by physical 4 · 0⤊ 0⤋
Because the when the warm water has no source of the heat, the cool air makes contact with the warm water and causes it to steam. (pretty sure)
2007-01-13 09:11:58 · answer #3 · answered by triple c 2 · 0⤊ 0⤋
Steam is mearly water vapour that is condensing.
When the water is on Boil the water vapour is hotter and therefore less dense it cools down slower and condenses at a slower rate ove a greater area, and therefore appears to be less dense. when you remove heat the water vapour travels less distance before it condenses and is therefor less dense
2007-01-15 07:52:43 · answer #4 · answered by Mackey God 2 · 0⤊ 0⤋